{"niche":"What is the most comfortable heart rate monitor chest strap for extended use?","description":"What is the most comfortable heart rate monitor chest strap for extended use?","products":[{"brand":"COOSPO","model":"H9Z Rechargeable Heart Rate Monitor Chest Strap (H9Z X1)","price_gbp":33.14,"origin_country":null,"specs":{"battery_life":"50 hours","compatibility":"Bluetooth and ANT+","waterproof_rating":"IP67","heart_rate_accuracy":"+1 bpm"},"confidence_score":null,"sources":[{"label":"coospo.com","url":"https://www.coospo.com/products/h9z-chest-heart-rate-monitor","currency":"USD","source_country":"US","price":43.89,"price_gbp":33.14,"scraped_at":"2026-06-23T07:54:48.305266"}],"summary":"COOSPO H9Z is a rechargeable chest-strap heart rate monitor that uses Bluetooth 5.0 and ANT+ for connecting to devices and apps. It's rated IP67 for water resistance and is designed for workout heart rate zone tracking with a 5-color LED. The rechargeable battery is rated for 50 hours per charge.","ideal_for":"For extended use, it has 50 hours battery life per charge and rechargeable 70 mAh lithium battery, avoiding battery changes during long training periods."}]}